diff --git a/dist/unstable-core-do-not-import/procedureBuilder.mjs b/dist/unstable-core-do-not-import/procedureBuilder.mjs
index dee2251696459f1e9abe8a05873a47e06dba0a1c..88ddde4d095b57461cf65f85c9ccceafff1ea2b5 100644
--- a/dist/unstable-core-do-not-import/procedureBuilder.mjs
+++ b/dist/unstable-core-do-not-import/procedureBuilder.mjs
@@ -162,9 +162,24 @@ async function callRecursive(index, _def, opts) {
         });
         return result;
     } catch (cause) {
+        const error = getTRPCErrorFromUnknown(cause)
+
+        // todo?:
+        // opts.onError?.({
+        //     ctx,
+        //     error,
+        //     input: rawInput,
+        //     path: '',
+        //     type: proc._def.type,
+        //   });
+
+        if (error.code === 'INTERNAL_SERVER_ERROR') {
+            throw error.cause;
+        }
+
         return {
             ok: false,
-            error: getTRPCErrorFromUnknown(cause),
+            error,
             marker: middlewareMarker
         };
     }